Machine for applying cement



Dec.25,1934. H, CHAPIN HAL 1,985,482

MACHINE FOR APPLYING CEMENT Filed June 13, 1931 2 Sheets-Sheet 1 Dec. 25, 1934. H. CHAPIN ET AL MACHINE FOR APPLYING CEiVIENT Filed June 15, 1931 2 Sheets-Sheet 2 Patented Dec. 25, 1-934 UNITED STATES PATENT OFFICE moms FOR arrLrnmci-nmn'r Herbert L. Chapin, Swampscott, and Arthur S. Johnson, Beverly, Mara, assignors to United Shoe Machinery Corporation, Paterson, NJ.- a corporation of New Jersey Application June 13, 1931. Serial No. 544,178

8Clai'ms.

This invention relates to machines for applying.

field of use is in connection with machines for applying to soles or shoe bottoms rubber'cement or celluloid cement which is rendered plastic or semi-fluid by the addition of a quick-drying solvent, and for purposes of illustration our invention will be herein described in its application to such machines. f v In manufacturing shoes of certain types it is the practice to apply a cement of the character discussed to the bottom of a lasted shoe and to the inner surface of a sole, particularly about 5 the margin thereof. The machine of our invention is well adapted for spraying shoe parts in that it maintains .the cement substantially out of contact with the air until discharged upon the surface of the work. thereby preventing losses by evaporation and the fire hazard incident to the use of cements containing volatile solvents. Difllculty has been encountered heretofore in machines of this type by'reason of the tendency of the cement to dry and harden in the so that after any interruption in the use of the machine the free now of the cement is impeded and it is dimcult to apply to the worka uniform coating of cement from the more or less obstructed discharge nozzle. An object of our invention is to eliminate this diiilculty and insure an even and uniform delivery of cement toth'e surface ofthe work under all conditions of use of the-machine. As shown, the machine is providedwith a reservoir or other source of supply for a liquid solvent together with suitable connections and controlling means for flushing the discharge nozzle and its connections with the solvent at the conclusion of the cement-applying operation. In this way cement remaining undelivered within the nozzle and the supply passages adjacent thereto is dissolved and carried out of the ma-- chine. leaving the latter in readiness to handle a new charge of cement without obstruction and always under uniform conditions of discharge. While the provision of a solvent supp y iiiv the machine for the purpose of flushing the disthe illustrated machine has a dischargenozrle' sociated with the discharge nozzle and is effective discharge nozzle and in the connections thereto associated with separate cement and solvent con- I tainers together with a single 'valvefor selectively admitting cement or solvent to the nozzle.

It is important in applying cement or other material to parts of boots and shoes that the material be confined accurately to the area which it is desired to coat. Our'invention includes as an important feature a shield of novel construction and adjustable characteristics which is as- 10 to cdnfinethe applied material accurately to those portions of the work which are to be coated and to protect the remainder of the work from being soiled thereby. Preferably andas herein shown. the work contacting shield is arranged for bodily 15 movement with respect to the discharge nozzle to control the flow of material therefrom by connections to a rotary. valve member. Accordingly, upon presentation of the work \by the operator, the discharge of cement or solvent, as 20 the case'may be, is initiated over a defined area,

' and upon the removal of the work from contact with the shield the discharge is immediately cut of! without requiring further attention on the part of the operator. 1

While the control of the discharge nozzle by the. presentation of the work is convenient in ,-most cases, we provide also treadle-operated mechanism which may be employed alternatively and when the conditions-require for controlling the discharge of cement or solvent independently of the shield.

These and other features of the invention will "be best understood and appreciated from the. fol-' lowing description of a preferred embodiment thereof, selected for purposes of illustration and shown in the accompanying drawings, in which Fig. 1 is a view in perspective of the machine; Fig. 2 is a view of the machine in longitudinal section on the line II--II of Fig. 5 T

Fig. 3 is a fragmentary view in cross section of the head containing the discharge nozzle on the line III11I of Fig. 2;

Fig. 4 is a fragmentary view of parts shown in Fig. 2 when in operative relation to the sole of the shoe; v V a Fig. 5 is a plan view with certain portions broken away; and a Fig. 6 is aview in side elevation with parts broken away.

The head frame 10 of the machine is supported at a convenient height upon a column and is provided with brackets in which is iournaled a driving shaft 11 carrying adrlving puller l2. The frame '10 is shaped to provide a compressed airas reservoir 13 and the air in this is maintained under pressure by'an air pump driven continuously from the shaft 11 while the machine is in use.

To the front of the head casting 10 is bolted arr outlet plate 14 having a downwardly and forwardly-extending hollow bracket 15 upon which the-operative parts of the machine are mounted. Upon one face the bracket 15 is provided with a projecting journal ring 16 and concentrically disposed with respect thereto upon its other face is a-boss 17 having a conicalv socket. A curved hollow arm 18 is removably supported upon the bracket 15 and to this end is forked and provided with a hollow branch arranged to fit upon the bearing ring 16 and with a solid branch carrying a cone pointed screw 19 which is adapted to fit into the socket of the boss 17 and draw the hollow branch with an interposed washer'into an airtight union with the hollow bracket 15. The hollow'branch of the arm 18 is provided with a 'rearwardly-extending projection which fits beneath a portion of the bracket 15 and so holds the arm 18 in substantially horizontal position. By the construction heretofore described the arm 18 may be readily assembled in. the machine or detached tofacilitate cleaning or otherwise.

The forward end of the arm 18 is provided with a hub or enlargement having a vertical bore therein to receive the hollow stemof a head 22 (Fig. 2) comprising a block portion (Fig. 3) and an upwardly extending hollow stem. The head isalso provided with a rearwardly and downwardly-extending bracket 23 upon the lower end of which is adjustably mounted an edge gage 24.

The hollow stem of the head 22 extends upwardly posed concentrically within the hollow stem of the head 22 and extending downwardly through the lower face of the head is a cylindrical valve member '30 having a head 31 secured to its upper end and provided with a thin projecting segmental flange 32 which underlies the flanged head of a stud 27 projecting upwardly from the washer 26. The member 30 is thus prevented by the engagement otthe flange .32 with the stud from being lifted bodily out of the stem in which his journaled.- The head 31 is'provided with acrank arm 33 and this in turn is connected through a horizontally-disposed link 34 to the upper end of a bell crank lever 35 fulcrumed upon a stud 36 which projects from the head 22. By the I oscillation of the bell crank lever 35 the memher 30 is'rocked, forpurposeszwhich will presently be described; v b 1} The cylindrical member 30, which has the function both of a valve and of an atomizing nozzle,

is provided with an inlet port 40 (Figs. 2 and 5) which registers with the port 29 in the stem of the vhead 22 and communicates with a central axially-extending passage 41. downwardly 1 and opens into a mixing chamber -42 located in the member 30 above an atomizing nozzle 43 which is fittedinto its lower end. The port 40 extends partially around the circumfer- This extends ence of the member 30 (Fig. 5) so-that in all operating positions of the latter an open air connection is maintained with the air passage-of the arm 18. Accordingly, whenever the 'machine is in'operation, a blast of 'air is continually. flowing from the compressed air reservoir 13 through the hollow bracket 15, the hollow" arm 18 and out through; the discharge nozzle 43; regardless of the angular position of the member- 30.

The member 30, as shown in Fig. 3, is also provided with an inlet port 44 which communicates with the mixing chamber 42 and with a horizontal passage 46in the body of the head 22.

The passage 46 communicates witha two-way valve 47 mounted in the head 22 and provided with an operating lever 48 by which the valve may be turned in one of three positions in accordance with the requirements of the work in hand. A pair of con verginginlet passages 50 and 51 in the head 22 lead to the valve 47. The passage 50 is in communication with a pipe 52 extending rearwardly and downwardly from the head .22 and entering a cement reservoir 53'supported from the column of themachine by a stem 54 adjustably received in a bracket member '55,

which is shaped as a tray to receive waste from the discharge nozzle. The cement reservoir 53 is provided with a holder 56 for an inverted container 5? for cement. The can in which the cement is commercially distributed may serve for this purpose, being arranged to discharge into the reservoir 53 by the barometric principle as cement is drawn from the reservoir by the action of the air current in flowing passed the end of the passage 46. It will be understood that.

cement is thus drawnfrom the supply, mixed in the chamber 42, and atomized from the discharge nozzle 43 upon the surface of 'work presented thereto.

The other inlet passage 51 communicates with a pipe 62 which extends outwardly and downwardly. as shown in Figs. 1 and 5, to a solvent reservoir 63 supported by a stem'64 mounted in thetray 55. The reservoir 63 is provided with a holder 66 for a solvent container, which may be arranged to supply the reservoir in the same mannerthat cement is supplied to the reservoir 53 but which is omitted from the drawings for the sake of clearness. The controlling valve 47, when positioned as shown in Fig. 3, that is to say. in registration with the inlet passage 50, renders the cement supply effective so that cement discharged from the spray nozzle 43. By tuming the handle 48 to 'an intermediate position, communication with both the cement reservoir and solvent reservoir may be shut oil, and by turning the handle further to bring the valve into registration with the inlet port 51 aneffective communication is established with the supply of solvent, so that the latter is drawn through the discharge nozzle '43,; and whatever cement may remain in the. passage 46, the mixing chamber I 42 or the nozzle, is dissolved and flushed from these parts" of the machine. The valve 47 and its handle 48, therefore, constitute manually-controlled-means for selectively rendering effective either the cement supply or the solvent supplyat the option of the operator and, moreover, the

construction is such that when one supply is renis provided with a combined gage and shield member which substantially encloses the discharge nozzle. 43 and is utilized for three important functions. .In the first place, it defines the area coated by the discharge from the nozzle; in the second place, it determines the distance frdm the nozzle to the surface to be'coated, en-

suring maximum efllciency in thisrespect; and,

' in the third place, it is utilized, when lifted by and held in any desired position of adjustment according to the effective, width required in the shield. The end flanges are cut back to allow the escape of air and thus to prevent the air within the shield from pushing the work away from the shield. Movement of thework is in such a direction that the cut back portions pass over the freshly applied cement without contact. A pin 70 projects outwardly from the slide 71 and is engaged between the forks of the horizontal arm of the bell crank lever 35, already referred to. This arm is extended forwardly so that it comes within the range of an adjustable stop screw 69 threaded into a boss upon the upwardly-extending bracket portion 21 of the head. By engaging the end of the bell crank lever the adjustable .stop regulates the lifting movement oi the slide 71 and the shield carried thereby. A tension spring 87 connected between the upper end oi the bell crank lever 35 and an ear projecting from the stationary portion 21 of, the head tends nor mally to swing the bell crank lever in a counter clocse direction, yieldingly holg the shield in its lowermost position and, through the 34, holding the rotary member so in the position indicated in Fig. 3, that is to say, with the inlet port 44 closed. The screw 69 may be positioned to control the degree of Open: w of the port 44 in the valve member 30- and hence the quantity. of fluid ejected.

e inmost cases it is convenient to initiate the spray discharge from the nozzle 13 by the presentation of the work through the lifting of the shield member, we also provide treadle-op- I erated means which may be employed if-desired.

as for example when especial accuracy is required in locating the work. To this end a bracket projects forwardly from the outlet plate id and is provided with a fulcrum stud 75 (Figs. 1 and-5) for a treadle lever 74 which, at its forward end, is rounded and bears agst the lower arm of the bell crank lever 35. A tension spring 7'? tends always to swing the other end of the lever 74 upwardly into engagement with a limiting stop is formed on the bracket and a treadle rod is providedfor swinging the lever in opposition to the spring 7?. Whenthe treadle rod is den,

the bell crank lever 35 is rocked in the manner already explained against the tension of the spring 37 to turn the rotary member 30 to open pert position. 1

The manner in which the machine is operated will be apparent from the foregoing description but may be summarized as follows. cement in 53 and solvent to the reservoir 63. The shaft 11 is thenset in motion from any suitable source of power and the pump 20 actuated to maintain the air in the reservoir 13 under pressure of suitable degree. An air current thereupon flows continuously through the hollow arm 18 to the rotary member 30 and out through the discharge port 43. Since the supply port 44 is closed, however, neither cement nor solvent ispermitted to reach the nozzle and air only is discharged therefrom. If it is now desired to coat a shoe bottom or other piece .of work with cement, the operator will .swing the handle 48 of the controlling valve 47 The operator may now lift the shield member by pressing the work upwardly or he may depress the, treadle to efiect'the same result and the bell crank lever 35 is thereupon rocked to turn the rotary member-30 to open port position. The action of the .air current in rushing past the supply port 44 when the latter registers with the passage 46 is to bring cement by suction into the mixing chamber 42, from which it is atomized downwardly from the nozzle 43 and reaches the surface of the work in a band or zone determined by the shield member. vanced in a position with respect to the nozzle determined by the contact of the work with the sides of the shield until the desired area has been completely coated; and in this operation it will The work is then ad-' be noted that the-edge of the work runs against the edge gage 24 so that the coated area is definitely located with respect 'to the edge of the work. At the conclusion of the cement-applying operationthe work is lowered or the trea'dlereleased, whereupon the spring 37 atonce rocks the bell crank lever reversely-and returns the rotary member 30 to closed port position, as shown in Fig. 3. i

If the machine is now to be left for any ap- Dreciable interval, there is a serious danger that the cement remaining within the discharge nozzle and its adjacent passages will harden by evapora tion' therefrom of its contained solvent. The operator, however, will now swing the handle 48 of the controlling valve 4'1 from the position shown in Fig; 3 to one in which the valve registers with the inlet passage 51 and having done so will depress the treadle or lift the shield to swing the rotary member 30 again into open port position. Under these circumstances, the air current flowing past the passage 46 will cause solvent to flow upwardly through the pipe 62 and the valve. 47,

flushing the communicating passages and the dis-.

charge nozzle with solvent, thereby dissolving the residue of cement and leaving these parts clean for a new cement-applying operation. The solvent used in the flushing operation and any other waste, as drippings from the inside of the shield member, are collected in the tray 55 and are drained into a container 58 detachably connected k thereto.

where cement of a substantially fluid character is employed the actual delivery of cement to the nozzle is caused by suction created by the passage scope of our invention, however, to employ cement of plastic rather than fluid characteristics and under such circumstances the power-operated means for delivering the cement to the discharge nozzle may be suitably modified. The details of the construction of the pumpare not herein shown since they form no part of the present invention. Such a pump as that disclosed in United States Letters Patent 1,311,161, granted July 29, 1919, on an applicationoi F. M. Furber, is satisfactory for the service of the illustrated machine. I A

While the machine herein described is intended and may be used with particular advantage in applying rubber cement or pyroxylin cement, it

may be used with equal advantage in applying any liquid coating 01 finish or the like to parts of'boots and shoes and similar work. If, for example, it should. be desired to apply a coating comprising a first or priming coat and then a finish coat, these materials may be supplied to the discharge nozzle from-the reservoirs above described.

Having thus described our invention, what we claim as newand desire to secure by Letters Patent is;

1. Acoating machine having a discharge nozzle, a work-contacting ,gage associated therewith and movable toward and away from the discharge said gage thereby to determine the distance from the nozzle of the surface to be coated, and a valve for controlling the discharge from thenozzle connected to the gage and arranged tobe positioned thereby.

2. A coating machine having a discharge nozzle, a movable shield for determining the area to be coated by the nozzle, and a valve for controlling the discharge from the nozzle, connected ,to the shield and arranged to be positioned nozzle, and connections between the shield and said rotary member for turning the same to open the supply valve when the shield is lifted by I the presentation of the work to the machine.

4. A coating machine having a rotary member in which is incorporated a discharge nozzle and an inlet port, a spring acting to hold said member normallyin position to 010% said port, a shield mounted adjacent to the nozzle and arranged to be moved by engagement with the work, a bell 1,986,482 of an past the supply port 44. It is within the cranklever connected to the shield, and connections between said lever and the rotary member .for turning the latter into position to open said inlet port. (A

5. A coating machine having an .-air operated spray nozzle, means ror supplying fluid coatin material thereto to be discharged as a spray, a shield forming a substantially closed passage surrounding the nozzleand having relatively 'adjustable sides with overlapping end flanges for defining the band of coating material upon the surface of a piece of work as the latter is brought into" contact with the edges of said sides, said end flanges being cut back from the work to avoid disturbance of ,the coating applied and an adjustable edge gage for determining the location of the coated band with respect to the edge of the work.

6. A coating machine having a base, an airoperated spray nozzle secured thereto, means for supplying fluid coating material to said nozzle to be discharged as a spray upon pieces of work manually presented to the machine, a shield ing thenozzle and having relatively adjustable sides with overlapping end flanges for defining the band of coating material upon the surface of the work, said end flanges being cut back from the work to avoid disturbance of the coating applied, the sides of said shield contacting with the forming a substantially closed passage surroundwork to determine the distance between the work and the nozzle outlet, and an adjustable gage against which the edge of the work may be held to determine the location or the coated band applied through said shield with respect to the edge of the work.

7. A coating machine having a discharge nozzle, supply connections for fluid coating material leading thereto and including a supply-controlling valve, a shield located adjacent to the nozzle, being connected to said valve and arranged to be moved by engagement with the workto open the valve, and treadle-operated means for operating the valve independently or pressure applied by the work to the shield. 8. A coating machine having a head, a rotary member mounted therein and having a spray nozzle and an inlet port, a vertically-movable slide mounted in said head and carrying a shield member disposed adJacent to the nozzle to define the .spread of its discharge, spring -mechanism for holding said rotary member initially in position to close said inlet port, and connections between said slide and rotary member arranged to be operated when said shield is engaged by the work to turn the rotary member to open-port position.

' HERBERT L. CHAPIN. ARTHUR S. JOHNSON.

I the record ofthe case in the Patent Office (Seal CERTIFICATE or CORRECTION.

Patent No. 1, 85, 482.

HERBERT L. CHAPIN, ET AL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, second column, line 9, before "angular" insert the word operating; page- 3, first column, line 42, before "portion" insert the word bracket; and page 4, second column, line 15. claim 5, after "applied" insert a comma; and that the said Letters Patent should be read with these corrections therein that the same may conform to Signed and sealed this 25th day of June, A. D. 1935.

Bryan M. Battey Acting Commissioner of Patents.

December 25, 1934. 

